1. A method of mounting an item to a support surface such as a floor, comprising the steps of:
mounting a base member to the support surface by use of an adhesive;
securing the item to a mounting member; and
securing the mounting member to the base plate.
2. The method of claim 1, wherein the step of securing the mounting member to the base member is carried out by providing a space between the mounting member, and the base member, and filling the space with a fluidic cementitious material.
3. The method of claim 2, wherein the step of providing a space between the mounting member and the base member is carried out so as to enable adjustment in the elevation of the mounting member, and thereby adjustment in the elevation of the item.
4. The method of claim 3, wherein the elevation of the mounting member is varied by means of one or more threaded members, each of which defines an end that engages the base member.
5. The method of claim 4, wherein each threaded member is threadedly engaged with an adjustment member associated with the item and having one or more threaded openings for receiving the threads of the one or more threaded members.
6. The method of claim 5, further comprising the step of removing the one or more threaded members from the adjustment member subsequent to filling the space with the fluidic cementitious material.
7. The method of claim 4, wherein the step of securing the mounting member to the base member includes maintaining the position of the mounting member subsequent to operation of the one or more threaded members to vary the elevation of the item.
8. The method of claim 7, wherein the step of maintaining the position of the mounting member is carried out by engaging one or more threaded retainer members with and between the base member and the mounting member, wherein the retainer members extend through the space between the mounting member and the base member.
9. The method of claim 8, wherein each retainer member includes a head in engagement with the base member, a shank that extends upwardly from the base member and through the space between the base member and the mounting member, and a threaded end portion that extends upwardly above the mounting member, wherein a threaded engagement member is engaged with the end portion of the threaded retainer member and with the mounting member.
10. The method of claim 9, including the step of positioning the mounting member so as to extend outwardly from each of a pair of opposed sides defined by the item, and engaging one of the threaded retainer members with the item outwardly of each side of the item.
11. The method of claim 7, further comprising the step of applying a concrete layer over the support surface, wherein the concrete layer has a thickness sufficient to encapsulate the base member and the mounting member.
12. A mounting assembly for mounting a rail to a support surface such as a floor without penetrating the support surface, comprising:
a base member mounted to the support surface via an adhesive located between facing surfaces defined by the base member and the support surface; and
an intermediate mounting member secured to the rail, wherein the intermediate mounting member is engaged with the base member to secure the rail in position relative to the support surface.
13. The mounting assembly of claim 12, further comprising a space defined between the intermediate mounting member and the base member.
14. The mounting assembly of claim 13, wherein the space between the intermediate mounting member and the base member is variable so as to enable adjustment of the elevation of the rail relative to the supporting surface.
15. The mounting assembly of claim 14, including one or more leveling members associated with the rail, each of which includes an end engaged with the base member for varying the elevation of the rail relative to the base member, and thereby varying the dimension of the space between the mounting member and the base member.
16. The mounting assembly of claim 15, wherein the mounting member is engaged with the base member via one or more threaded retainer members that extend between the base member and the mounting member and through the space therebetween for maintaining the position of the mounting member relative to the base member, and further comprising a fluidic setting material located within the space between the mounting member and the base member for maintaining the elevation of the rail..
17. A system for mounting a member to a support surface, comprising:
base means secured to the support surface via an adhesive; and
variable height engagement means for engaging the member with the base means and for enabling the elevation of the member relative to the support surface to be varied.
18. The system of claim 17, wherein the base means comprises a base member having an upwardly facing surface, and wherein the variable height engagement means comprises an anchor member to which the member is secured, and a height adjustment arrangement interposed between the anchor member and the base member.
19. The system of claim 18, wherein the height adjustment arrangement is operable to locate the anchor member and the member at a desired elevation, wherein a space is defined between the anchor member and the upwardly facing surface of the base member, and further comprising a fluidic setting material located within the space so as to maintain the position of the anchor member and the member relative to the base member.
20. The system of claim 19, wherein the height adjustment arrangement comprises one or more threaded height adjustment members interconnected with the rail and engageable with the upwardly facing surface of the base member, wherein rotation of the one or more threaded height adjustment members functions to adjust the elevation of the member relative to the base member.
21. The system of claim 19, further comprising retainer means for maintaining the position of the anchor member and the member upon placement of the fluidic setting material into the space between the anchor member and the upwardly facing surface of the base member.
22. The system of claim 21, wherein the retainer means comprises one or more threaded fasteners interconnected with and extending upwardly from the base member and through one or more openings associated with the anchor member, and an engagement member threadedly engaged with each of the threaded fasteners so as to prevent upward movement of the anchor member.
23. The system of claim 22, wherein the height adjustment arrangement engages the upwardly facing surface of the base member so as to maintain the elevation of the anchor member and the member relative to the base member, and wherein the one or more threaded fasteners and the associated threaded engagement members are operable to apply downward pressure on the anchor member such that the height adjustment arrangement and the one or more threaded fasteners are operable to fix the position of the anchor member relative to the base member.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for controlling a motor of a type whose speed is measured by detecting back-EMF from pole pair interaction, said method comprising:
establishing a back-EMF detection period;
reducing a varying voltage drop across said motor at least during said detection period;
tristating a first phase of said motor at least while said varying voltage drop is reduced;
driving a second phase of said motor with a voltage at an upper end of said reduced varying voltage drop; and
driving a third phase of said motor with a voltage at a lower end of said reduced varying voltage drop.
2. Apparatus for controlling a motor of a type whose speed is measured by detecting back-EMF from pole-pair interaction, said apparatus comprising:
means for establishing a back-EMF detection period;
means for reducing voltage drop across said motor at least during said detection period;
means for tristating a first phase of said motor at least while said voltage drop is reduced;
means for pulling power to a second phase of said motor to an upper end of said reduced voltage drop; and
means for pulling power to a third phase of said motor to a lower end of said reduced voltage drop.
3. The apparatus of claim 2 wherein said means for tristating tristates said first phase prior to said detection period.
4. The apparatus of claim 2 wherein said means for reducing comprises means for regulating said lower end of said voltage drop such that said voltage across said motor ranges between a supply voltage and a voltage above ground.
5. The apparatus of claim 4 wherein said means for regulating comprises:
means for feeding back said lower end of said voltage drop; and
means for comparing said fed back lower end of said voltage drop to a reference voltage above ground.
6. The apparatus of claim 5 further comprising means for determining said reference voltage above ground, including means for applying a duty cycle factor to said supply voltage.
7. The apparatus of claim 6 wherein:
said voltage drop across said motor varies trapezoidally over time; and
said duty cycle factor comprises a ratio of a user motor speed setting to a maximum motor speed setting.
8. The apparatus of claim 6 wherein:
said voltage drop across said motor varies sinusoidally over time; and
said duty cycle factor comprises a product of (a) a ratio of a user motor speed setting to a maximum motor speed setting, and (b) a factor representing sinusoidal variation of said time-varying voltage drop.
9. The apparatus of claim 8 wherein said factor representing sinusoidal variation of said time-varying voltage drop is approximated as a constant.
10. The apparatus of claim 9 wherein said constant is about 0.5.
11. The apparatus of claim 9 wherein said apparatus further comprises means for adjusting said constant.
12. The apparatus of claim 2 wherein said means for reducing comprises means for regulating said upper end of said voltage drop such that said voltage drop across said motor ranges between ground and a voltage below a supply voltage.
13. The apparatus of claim 12 wherein said means for regulating comprises:
means for feeding back said upper end of said voltage drop; and
means for comparing said fed back upper end of said voltage drop to a reference voltage below said supply voltage.
14. The apparatus of claim 13 further comprising means for determining said reference voltage below said supply voltage, including means for applying a duty cycle factor to said supply voltage.
15. The apparatus of claim 14 wherein:
said voltage drop across said motor varies trapezoidally over time; and
said duty cycle factor comprises a ratio of a user motor speed setting to a maximum motor speed setting.
16. The apparatus of claim 14 wherein:
said voltage drop across said motor varies sinusoidally over time; and
said duty cycle factor comprises a product of (a) a ratio of a user motor speed setting to a maximum motor speed setting, and (b) a factor representing sinusoidal variation of said time-varying voltage drop.
17. The apparatus of claim 16 wherein said factor representing sinusoidal variation of said time-varying voltage drop is approximated as a constant.
18. The apparatus of claim 17 wherein said constant is about 0.5.
19. The apparatus of claim 18 further comprising means for adjusting said constant.
20. The apparatus of claim 2 wherein:
said voltage drop across said motor varies over time; and
said means for reducing comprises means for reducing said voltage drop to an average value of said time-varying voltage drop.
21. The apparatus of claim 20 wherein said means for reducing comprises means for applying a duty cycle factor to a supply voltage.
22. The apparatus of claim 21 wherein:
said time-varying voltage drop varies trapezoidally; and
said duty cycle factor comprises a ratio of a user motor current setting to a maximum motor current setting.
23. The apparatus of claim 21 wherein:
said time-varying voltage drop varies sinusoidally; and
said duty cycle factor comprises a product of (a) a factor representing sinusoidal variation of said time-varying voltage drop, and (b) a ratio of a user motor current setting to a maximum motor current setting.
24. The apparatus of claim 23 wherein said factor representing sinusoidal variation of said time-varying voltage drop is approximated as a constant.
25. The apparatus of claim 24 wherein said constant is about 0.5.
26. The apparatus of claim 24 further comprising means for adjusting said constant.
27. Apparatus for controlling a motor of a type whose speed is measured by detecting back-EMF from pole-pair interaction, said apparatus comprising:
means for establishing a back-EMF detection period;
means for reducing voltage drop across said motor at least during said detection period;
means for tristating a first phase of said motor at least while said voltage drop is reduced;
means for driving a second phase of said motor to an upper end of said reduced voltage drop; and
means for driving a third phase of said motor to a lower end of said reduced voltage drop.
28. The apparatus of claim 27 wherein said means for tristating tristates said first phase prior to said detection period.
29. The apparatus of claim 27 wherein said means for reducing comprises means for regulating said lower end of said voltage drop such that said voltage across said motor ranges between a supply voltage and a voltage above ground.
30. The apparatus of claim 29 wherein said means for regulating comprises:
means for feeding back said lower end of said voltage drop; and
means for comparing said fed back lower end of said voltage drop to a reference voltage above ground.
31. The apparatus of claim 30 further comprising means for determining said reference voltage above ground, including means for applying a duty cycle factor to said supply voltage.
32. The apparatus of claim 31 wherein:
said voltage drop across said motor varies trapezoidally over time; and
said duty cycle factor comprises a ratio of a user motor speed setting to a maximum motor speed setting.
33. The apparatus of claim 31 wherein:
said voltage drop across said motor varies sinusoidally over time; and
said duty cycle factor comprises a product of (a) a ratio of a user motor speed setting to a maximum motor speed setting, and (b) a factor representing sinusoidal variation of said time-varying voltage drop.
34. The apparatus of claim 33 wherein said factor representing sinusoidal variation of said time-varying voltage drop is approximated as a constant.
35. The apparatus of claim 34 wherein said constant is about 0.5.
36. The apparatus of claim 34 wherein said apparatus further comprises means for adjusting said constant.
37. The apparatus of claim 27 wherein said means for reducing comprises means for regulating said upper end of said voltage drop such that said voltage drop across said motor ranges between ground and a voltage below a supply voltage.
38. The apparatus of claim 37 wherein said means for regulating comprises:
means for feeding back said upper end of said voltage drop; and
means for comparing said fed back upper end of said voltage drop to a reference voltage below said supply voltage.
39. The apparatus of claim 38 further comprising means for determining said reference voltage below said supply voltage, including means for applying a duty cycle factor to said supply voltage.
40. The apparatus of claim 39 wherein:
said voltage drop across said motor varies trapezoidally over time; and
said duty cycle factor comprises a ratio of a user motor speed setting to a maximum motor speed setting.
41. The apparatus of claim 39 wherein:
said voltage drop across said motor varies sinusoidally over time; and
said duty cycle factor comprises a product of (a) a ratio of a user motor speed setting to a maximum motor speed setting, and (b) a factor representing sinusoidal variation of said time-varying voltage drop.
42. The apparatus of claim 41 wherein said factor representing sinusoidal variation of said time-varying voltage drop is approximated as a constant.
43. The apparatus of claim 42 wherein said constant is about 0.5.
44. The apparatus of claim 43 further comprising means for adjusting said constant.
45. The apparatus of claim 27 wherein:
said voltage drop across said motor varies over time; and
said means for reducing comprises means for reducing said voltage drop to an average value of said time-varying voltage drop.
46. The apparatus of claim 45 wherein said means for reducing comprises means for applying a duty cycle factor to a supply voltage.
47. The apparatus of claim 46 wherein:
said time-varying voltage drop varies trapezoidally; and
said duty cycle factor comprises a ratio of a user motor current setting to a maximum motor current setting.
48. The apparatus of claim 46 wherein:
said time-varying voltage drop varies sinusoidally; and
said duty cycle factor comprises a product of (a) a factor representing sinusoidal variation of said time-varying voltage drop, and (b) a ratio of a user motor current setting to a maximum motor current setting.
49. The apparatus of claim 48 wherein said factor representing sinusoidal variation of said time-varying voltage drop is approximated as a constant.
50. The apparatus of claim 49 wherein said constant is about 0.5.
51. The apparatus of claim 49 further comprising means for adjusting said constant.